All of them
It's the Arabian country that is named by all Arabs as Palestine,however it was occupied in 1948 by the Jews who named it Israel.
The Crusades were rising hostility to the Jews. More and More Christians believed that all non-Christians were their enemy. On their way to Palestine, some Crusaders massacred European Jews and continued the killing in Palestine. After the Crusades, Jews were expelled from England in 1290 and from France in 1306 and again in 1394. Many of these Jews moved to eastern Europe. Many Crusaders who stayed in Palestine came to respect Muslims, but Cristian tolerance toward Jews continued.
There is no such group.
No one. Unlike the First Destruction, the Jews were never thrown out of Palestine (Judea) after the Second Destruction or later. Rather, they were expelled from the Jerusalem area only, and most of them (but not all) left the land gradually, as conditions got too harsh. They were still a majority of Palestine's population as late as the mid-4th century CE. See also:History of the Jews in IsraelDiaspora
Prior to 1948, Palestine had gone through a number of demographic shifts. The Roman sacking of Jerusalem in 70 AD resulted in many Jewish inhabitants being enslaved, although many Jews and Samaritans in the countryside remained. Many Jews moved back to the land over the following centuries as indicated by the many Sephardic villages in Palestine and all over the Middle East. Despite the Muslim conquest, the Crusades, and the Ottomans, the Sephardic Jewish population of Palestine grew, and the Old Jewish Quarter in Jerusalem was often the most populated in the city. In the 19th century, Ashkenazi Jews from Europe began moving to Palestine for reasons religious, zionist, and/or due to anti-semitic pressures in Europe...this is the time many people consider "the return of the Jews to the Holy Land" which fails to recognize the continuing presence of Sephardic Jews. In the 20th century, the Jews of Palestine, considered themselves Palestinians until Israel declared independence in 1948, at which point they considered themselves Israelis. At that time, Jews and Muslim Arabs were in almost equal numbers along with Christians, Druze, etc.
Most Jews share a common Near Eastern Levantite ancestry with the Palestinian people but some Jews have intermixed heavily with their host people (i.e. Persian Jews with Persians, Spanish Jews with Spaniards, Polish Jews with Poles, etc.). Palestinians have been highly influenced by Arabs and by Islam but still retain similar cultural aspects as Jews. Arabic and Hebrew are somewhat similar (many similar words like malik/melekh, ane/ani, Allah/Eloah, etc. and grammar).
They are two different cultures. Palestinians are generally Arab Muslims, with roots in the area going back to at least the Byzantine era, if not longer. Israelis are generally Jews of all ethnicities, traditionally believed to be the descendants of the diaspora come back to the "Promised Land" of Moses. Each has a strong argument as to why they should be there, but only the Israelis have had recognized legitimacy from the Western World, especially the US.
The Jews claim that the land dates back to 3,000 years when Jewish kings ruled the regions from Jerusalem. To Palestinians, the land had belonged to them since most, but not all, Jews were driven out around A.D. 135. Islam spread in the 7th century and quickly became the dominant region.
Yes
2000 years ago, after the death of Jesus, the Romans kicked the Jews out of Israel/Palestine. This period of time is called the Diaspora. In 1948, after WWII, the United Nations said the Jews could return to Palestine/Israel and have their own nation. The problem is in 2000 years, a lot of Palestine people moved into the land formerly occupied by the Jews/Israelis. So, you have a group of people, the Jews, who want to return to the land they taken away from by force 2000 years ago. You also have a group of people, the Palestine, who have lived on the land for the last 2000 years. Considering how much land was taken away from one group or another in the past, it is very difficult to give back all the land on the planet to it's original inhabitants. For example. a great deal of land in the USA was taken away from the Native Americans. It's obvious that the Native Americans are not going to get most of the land that taken away from them by force.
There are racist Jews and Jews that don't know Jews come in all colors.